Leeds & Northrup Company

Organization

North Wales, PA, US

Organizations

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Patents Grantslast 30 patents

Information Patent Grant
Remote correlation of sequence of events
- Patent number 4,545,029
- Issue date Oct 1, 1985
- Leeds & Northrup Company
- John E. Collier
- G05 - CONTROLLING REGULATING
Information Patent Grant
Fast response surface contact temperature sensor
- Patent number 4,492,948
- Issue date Jan 8, 1985
- Leeds & Northrup Company
- Wilson A. Clayton
- G01 - MEASURING TESTING
Information Patent Grant
Cathode ray tube system with strip chart recorder display format
- Patent number RE31773
- Issue date Dec 18, 1984
- Leeds & Northrup Company
- Gerard M. Foley
- 358 - Facsimile and static presentation processing
Information Patent Grant
Measuring system
- Patent number RE31774
- Issue date Dec 18, 1984
- Leeds & Northrup Company
- David L. Fletcher
- 364 -
Information Patent Grant
Remote correlation of sequence of events
- Patent number 4,473,889
- Issue date Sep 25, 1984
- Leeds & Northrup Company
- Charles W. Ross
- G05 - CONTROLLING REGULATING
Information Patent Grant
Thin film resistance thermometer with a predetermined temperature c...
- Patent number 4,469,717
- Issue date Sep 4, 1984
- Leeds & Northrup Company
- Ronald D. Baxter
- G01 - MEASURING TESTING
Information Patent Grant
Humidity sensing element
- Patent number 4,429,343
- Issue date Jan 31, 1984
- Leeds & Northrup Company
- Paul J. Freud
- G01 - MEASURING TESTING
Information Patent Grant
Time deviation and inadvertent interchange correction for automatic...
- Patent number 4,419,733
- Issue date Dec 6, 1983
- Leeds & Northrup Company
- Charles W. Ross
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Multi-processor data communication bus structure
- Patent number 4,417,303
- Issue date Nov 22, 1983
- Leeds & Northrup Company
- Simon Korowitz
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Self tuning of P-I-D controller by conversion of discrete time mode...
- Patent number 4,407,013
- Issue date Sep 27, 1983
- Leeds & Northrup Company
- Samuel A. Arcara
- G05 - CONTROLLING REGULATING
Information Patent Grant
Multiple-cavity variable capacitance pressure transducer
- Patent number 4,390,925
- Issue date Jun 28, 1983
- Leeds & Northrup Company
- Paul J. Freud
- G01 - MEASURING TESTING
Information Patent Grant
Preamplifier for low voltage signals in the presence of high voltag...
- Patent number 4,389,674
- Issue date Jun 21, 1983
- Leeds & Northrup Company
- James J. Hitt
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Filter arrangement for elimination of unwanted bias in a model refe...
- Patent number 4,385,362
- Issue date May 24, 1983
- Leeds & Northrup Company
- Samuel A. Arcara
- G05 - CONTROLLING REGULATING
Information Patent Grant
Microprocessor directed optical pyrometer
- Patent number 4,375,333
- Issue date Mar 1, 1983
- Leeds & Northrup Company
- Alexander H. Clark
- G01 - MEASURING TESTING
Information Patent Grant
Power failure early warning circuit for microprocessor with CMOS RA...
- Patent number 4,375,663
- Issue date Mar 1, 1983
- Leeds & Northrup Company
- Samuel A. Arcara
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Thin film resistance thermometer device with a predetermined temper...
- Patent number 4,375,056
- Issue date Feb 22, 1983
- Leeds & Northrup Company
- Ronald D. Baxter
- G01 - MEASURING TESTING
Information Patent Grant
Digital drive unit regulator
- Patent number 4,374,351
- Issue date Feb 15, 1983
- Leeds & Northrup Company
- Walter Fishman
- G05 - CONTROLLING REGULATING
Information Patent Grant
Automatic identification system for self tuning process controller
- Patent number 4,368,510
- Issue date Jan 11, 1983
- Leeds & Northrup Company
- Paul Anderson
- G05 - CONTROLLING REGULATING
Information Patent Grant
Analog to digital converter with offset error correction
- Patent number 4,337,456
- Issue date Jun 29, 1982
- Leeds & Northrup Company
- George W. Deffendall
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Compensator for slowly responding sensors
- Patent number 4,337,434
- Issue date Jun 29, 1982
- Leeds & Northrup Company
- John D. Fogel
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Injection-molded Doppler flowmeter transducer assembly
- Patent number 4,333,352
- Issue date Jun 8, 1982
- Leeds & Northrup Company
- James G. Connery
- G01 - MEASURING TESTING
Information Patent Grant
Preamplifier for voltage measuring instrument with non-interacting...
- Patent number 4,315,211
- Issue date Feb 9, 1982
- Leeds & Northrup Company
- Thomas J. Walsh
- G01 - MEASURING TESTING
Information Patent Grant
Ultrasonic Doppler flowmeter with correction for vibratory signals...
- Patent number 4,280,365
- Issue date Jul 28, 1981
- Leeds & Northrup Company
- James G. Connery
- G01 - MEASURING TESTING
Information Patent Grant
Boiler control system
- Patent number 4,278,052
- Issue date Jul 14, 1981
- Leeds & Northrup Company
- Everett H. Sharp
- F22 - STEAM GENERATION
Information Patent Grant
Expandable phase change detector device
- Patent number 4,274,284
- Issue date Jun 23, 1981
- Leeds & Northrup Company
- Richard J. Hance
- G01 - MEASURING TESTING
Information Patent Grant
Control of parallel operated turbines in cogeneration
- Patent number 4,271,473
- Issue date Jun 2, 1981
- Leeds & Northrup Company
- Charles W. Ross
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Optical sample cell for analysis of particles in liquid suspension
- Patent number 4,265,538
- Issue date May 5, 1981
- Leeds & Northrup Company
- Alan L. Wertheimer
- G01 - MEASURING TESTING
Information Patent Grant
Sample cell window cleaning device
- Patent number 4,245,914
- Issue date Jan 20, 1981
- Leeds & Northrup Company
- Peter J. Clack
- G01 - MEASURING TESTING
Information Patent Grant
Method and apparatus for controlling steam temperature at a boiler...
- Patent number 4,241,701
- Issue date Dec 30, 1980
- Leeds & Northrup Company
- Richard H. Morse
- F22 - STEAM GENERATION
Information Patent Grant
Thin film resistance thermometer detector probe assembly
- Patent number 4,242,659
- Issue date Dec 30, 1980
- Leeds & Northrup Company
- Ronald D. Baxter
- G01 - MEASURING TESTING

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Trademarklast 30 trademarks

Information Trademark
74382147 - TRI-LASER
- Serial number 74382147
- Registration number 1833726
- Filing date Apr 26, 1993
- Leeds & Northrup Company
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
74265107 - ACCUGUARD
- Serial number 74265107
- Registration number 1739613
- Filing date Apr 13, 1992
- Leeds & Northrup Company
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
73585363 - MELTLAB
- Serial number 73585363
- Registration number 1409325
- Filing date Feb 25, 1986
- Leeds & Northrup Company
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
73566172 - PH PEN
- Serial number 73566172
- Registration number 1396614
- Filing date Oct 31, 1985
- Leeds & Northrup Company
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
73261358 - MULTITIP
- Serial number 73261358
- Registration number 1167092
- Filing date May 8, 1980
- Leeds & Northrup Company
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
73223396 - MDM
- Serial number 73223396
- Registration number 1181897
- Filing date Jul 16, 1979
- Leeds & Northrup Company
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
73202227 - MAXILAB
- Serial number 73202227
- Registration number 1136640
- Filing date Feb 1, 1979
- LEEDS AND NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
73183275 - ISOVAC
- Serial number 73183275
- Registration number 1125335
- Filing date Aug 24, 1978
- LEEDS AND NORTHRUP COMPANY
- 11 - Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes
Information Trademark
73172614 - RESIMELT
- Serial number 73172614
- Registration number 1119571
- Filing date Jun 1, 1978
- LEEDS AND NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
73163912 - MICROTRAC
- Serial number 73163912
- Registration number 1114036
- Filing date Mar 20, 1978
- LEEDS AND NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
73086311 - MEREDIAN
- Serial number 73086311
- Registration number 1055025
- Filing date May 6, 1976
- LEEDS AND NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
73034773 - CENTRY
- Serial number 73034773
- Registration number 1034675
- Filing date Oct 16, 1974
- LEEDS AND NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
73014771 - TAPTIP
- Serial number 73014771
- Registration number 1008336
- Filing date Mar 1, 1974
- LEEDS AND NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
73012161 - TEMP-O-TIP
- Serial number 73012161
- Registration number 1020400
- Filing date Jan 30, 1974
- LEEDS AND NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
72411197 - SILGUIDE
- Serial number 72411197
- Registration number 961458
- Filing date Dec 27, 1971
- LEEDS AND NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
72404452 - FYRESTAN
- Serial number 72404452
- Registration number 956481
- Filing date Oct 6, 1971
- LEEDS AND NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
72372348 - SILTRAK
- Serial number 72372348
- Registration number 928682
- Filing date Oct 2, 1970
- LEEDS AND NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
72351620 - TRENDTRAK
- Serial number 72351620
- Registration number 913208
- Filing date Feb 17, 1970
- LEEDS AND NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
72348547 - INFOTRAK
- Serial number 72348547
- Registration number 913197
- Filing date Jan 14, 1970
- LEEDS AND NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
72338253 - SAMPTIP
- Serial number 72338253
- Registration number 949754
- Filing date Sep 18, 1969
- LEEDS AND NORTHRUP COMPANY
- 7 - Machines and machine tools
Information Trademark
72314095 - DIPTIP
- Serial number 72314095
- Registration number 876983
- Filing date Dec 10, 1968
- LEEDS AND NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
72251637 - SPECTRAY
- Serial number 72251637
- Registration number 849026
- Filing date Aug 3, 1966
- LEEDS & NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
72248817 - MILLITEMP
- Serial number 72248817
- Registration number 867141
- Filing date Jun 23, 1966
- LEEDS & NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
72234129 - FLEXELECT
- Serial number 72234129
- Registration number 816552
- Filing date Dec 7, 1965
- LEEDS & NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
72214447 - QUIKTIP
- Serial number 72214447
- Registration number 802154
- Filing date Mar 18, 1965
- LEEDS & NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
72204385 - CONTROLALL
- Serial number 72204385
- Registration number 803060
- Filing date Oct 20, 1964
- LEEDS AND NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
72198750 - CLEERTREND
- Serial number 72198750
- Registration number 798363
- Filing date Jul 29, 1964
- LEEDS & NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
72174967 - TESTIP
- Serial number 72174967
- Registration number 773622
- Filing date Aug 13, 1963
- LEEDS & NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
72163736 - TECTIP
- Serial number 72163736
- Registration number 763883
- Filing date Mar 1, 1963
- LEEDS & NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
72146293 - AZAR
- Serial number 72146293
- Registration number 755995
- Filing date Jun 6, 1962
- LEEDS & NORTHRUP COMPANY
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments

Leeds & Northrup Company

Organization

Patents Grantslast 30 patents

Remote correlation of sequence of events

Fast response surface contact temperature sensor

Cathode ray tube system with strip chart recorder display format

Measuring system

Remote correlation of sequence of events

Thin film resistance thermometer with a predetermined temperature c...

Humidity sensing element

Time deviation and inadvertent interchange correction for automatic...

Multi-processor data communication bus structure

Self tuning of P-I-D controller by conversion of discrete time mode...

Multiple-cavity variable capacitance pressure transducer

Preamplifier for low voltage signals in the presence of high voltag...

Filter arrangement for elimination of unwanted bias in a model refe...

Microprocessor directed optical pyrometer

Power failure early warning circuit for microprocessor with CMOS RA...

Thin film resistance thermometer device with a predetermined temper...

Digital drive unit regulator

Automatic identification system for self tuning process controller

Analog to digital converter with offset error correction

Compensator for slowly responding sensors

Injection-molded Doppler flowmeter transducer assembly

Preamplifier for voltage measuring instrument with non-interacting...

Ultrasonic Doppler flowmeter with correction for vibratory signals...

Boiler control system

Expandable phase change detector device

Control of parallel operated turbines in cogeneration

Optical sample cell for analysis of particles in liquid suspension

Sample cell window cleaning device

Method and apparatus for controlling steam temperature at a boiler...

Thin film resistance thermometer detector probe assembly

Trademarklast 30 trademarks

74382147 - TRI-LASER

74265107 - ACCUGUARD

73585363 - MELTLAB

73566172 - PH PEN

73261358 - MULTITIP

73223396 - MDM

73202227 - MAXILAB

73183275 - ISOVAC

73172614 - RESIMELT

73163912 - MICROTRAC

73086311 - MEREDIAN

73034773 - CENTRY

73014771 - TAPTIP

73012161 - TEMP-O-TIP

72411197 - SILGUIDE

72404452 - FYRESTAN

72372348 - SILTRAK

72351620 - TRENDTRAK

72348547 - INFOTRAK

72338253 - SAMPTIP

72314095 - DIPTIP

72251637 - SPECTRAY

72248817 - MILLITEMP

72234129 - FLEXELECT

72214447 - QUIKTIP

72204385 - CONTROLALL

72198750 - CLEERTREND

72174967 - TESTIP

72163736 - TECTIP

72146293 - AZAR